Being the influencer he is, Zuckerberg's post has been liked by more than three million people, who lauded his public stance on the controversial subject of vaccinations.

"As someone with autism, with a son with autism, as someone who is constantly watching good people put their own children at serious risk because of old, fraudulent fears of vaccines and autism... thank you for being sensible. Thank you for doing what's right and also for showing everyone else that it's the right thing to do as well," wrote commenter Stuart Duncan.

The debate over vaccination took center stage in California right after a measles outbreak in Disneyland. More than 131 Californians were infected, but no one died from the outbreak. Only 81 of the 131 people infected had vaccination documentation.

Last June, California Gov. Jerry Brown signed a bill that says that only children with serious health problems may opt out of school-mandated vaccinations. The law is intended to boost vaccination rated in the state.

"The science is clear that vaccines dramatically protect children against a number of infectious and dangerous diseases," Brown wrote while signing the bill. "While it's true that no medical intervention is without risk, the evidence shows that immunization powerfully benefits and protects the community."